US Bridges

Cth B over Middle River

Good

Douglas County, Wisconsin · 1.2M W JCT Ush 53 · Structure no. B16003900000000

Built
1975
50 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
1,971
2022 count
Owner
County
County Highway Agency

About this bridge

Cth B over Middle River is a concrete continuous culvert carrying Cth B over Middle River in Douglas County, Wisconsin. It was built in 1975, so it is 50 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,971 vehicles a day, projected to reach 2,168 by 2043. The structure is 26 ft (8 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesCth B
CrossesMiddle River
Location1.2M W JCT Ush 53
RouteCounty Highway 0B
Coordinates46.50322, -91.85786
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length26 ft (8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,971 (2022)
Projected traffic2,168 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth B over Middle River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Cth B over Middle River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Cth B over Middle River carry?

About 1,971 vehicles per day (2022 count).

How long is Cth B over Middle River?

The structure is 26 ft (8 m) long with a longest span of 12 ft (3.7 m).

Who owns Cth B over Middle River?

It is owned by the County Highway Agency.